Modified thermoplastic polyester elastomer

ABSTRACT

A modified thermoplastic polyester elastomer and a breathable and waterproof membrane are provided. The modified thermoplastic polyester elastomer is formed from a thermoplastic polyester elastomer, a regenerated polyethylene terephthalate, and a compatibilizer. Based on a total weight of the modified thermoplastic polyester elastomer being 100 phr, a content of the regenerated polyethylene terephthalate is greater than 0 phr and up to 50 phr. Based on a total weight of the thermoplastic polyester elastomer being 100 wt %, the thermoplastic polyester elastomer includes 25 wt % to 75 wt % of hard segments and 25 wt % to 75 wt % of soft segments.

CROSS-REFERENCE TO RELATED PATENT APPLICATION

This application claims the benefit of priority to Taiwan PatentApplication No. 109129683, filed on Aug. 31, 2020. The entire content ofthe above identified application is incorporated herein by reference.

Some references, which may include patents, patent applications andvarious publications, may be cited and discussed in the description ofthis disclosure. The citation and/or discussion of such references isprovided merely to clarify the description of the present disclosure andis not an admission that any such reference is “prior art” to thedisclosure described herein. All references cited and discussed in thisspecification are incorporated herein by reference in their entiretiesand to the same extent as if each reference was individuallyincorporated by reference.

FIELD OF THE DISCLOSURE

The present disclosure relates to a modified thermoplastic polyesterelastomer and a breathable and waterproof membrane, and moreparticularly to a modified thermoplastic polyester elastomer used as amaterial for a breathable and waterproof membrane, where the breathableand waterproof membrane that is made from the modified thermoplasticpolyester elastomer has good moisture permeability.

BACKGROUND OF THE DISCLOSURE

A breathable and waterproof membrane is a membrane that is permeable tomoisture but impermeable to liquid water. Moisture is water in a gaseousstate and has small volume, and is thus capable of passing through thebreathable and waterproof membrane from one side to another side bycapillarity. Accordingly, the breathable and waterproof membrane ismoisture-permeable. However, when moisture condenses into liquid water,molecules of the liquid water tend to aggregate into a molecular clusterunder a coaction of surface tension and cohesive force. The molecularcluster has a large size, and cannot pass through the breathable andwaterproof membrane from one side to another side, thereby enabling thebreathable and waterproof membrane to be waterproof.

Most conventional breathable and waterproof membranes usepolytetrafluoroethylene (PTFE) as the main material, so that abreathable and waterproof membrane having micropores can be produced. Amechanism of the breathable and waterproof membrane having themicropores to be moisture-permeable is to utilize a pressure differenceof water vapor on both sides of the membrane, so as to drive the watervapor through the micropores and achieve the moisture-permeable effect.However, after a long period of use, the micropores of the breathableand waterproof membrane may be blocked, resulting in a decrease in themoisture permeability of the breathable and waterproof membrane.Moreover, the breathable and waterproof membrane made frompolytetrafluoroethylene is not easily decomposed, thereby causing anegative impact on the environment.

According to the above, there is a decrease in the moisture-permeableeffect of the conventional breathable and waterproof membranes overtime, and the breathable and waterproof membrane is not easilydecomposed. In order to overcome the above-mentioned issues, the presentdisclosure provides a modified thermoplastic polyester elastomer. Byhaving good moisture permeability, the modified thermoplastic polyesterelastomer of the present disclosure can be used to manufacture thebreathable and waterproof membrane, and can be applied to functionalapparel, e.g., medical isolation gowns and protective gowns, but thepresent disclosure is not limited thereto.

SUMMARY OF THE DISCLOSURE

In response to the above-referenced technical inadequacies, the presentdisclosure provides a modified thermoplastic polyester elastomer and abreathable and waterproof membrane that have good moisture permeabilityand use a high percentage of regenerated plastic, thereby achieving theeffect of reusing recycled plastic.

In one aspect, the present disclosure provides a modified thermoplasticpolyester elastomer that includes a thermoplastic polyester elastomer, aregenerated polyethylene terephthalate, and a compatibilizer. Based on atotal weight of the modified thermoplastic polyester elastomer being 100phr, a content of the regenerated polyethylene terephthalate is greaterthan 0 phr and up to 50 phr. Based on a total weight of thethermoplastic polyester elastomer being 100 wt %, the thermoplasticpolyester elastomer includes 25 wt % to 75 wt % of hard segments and 25wt % to 75 wt % of soft segments.

In certain embodiments, the hard segment is formed by an aromaticpolyester and the soft segment is formed by an aliphatic polyester or analiphatic polyether.

In certain embodiments, the aromatic polyester that forms the hardsegment is selected from the group consisting of polybutyleneterephthalate and polyethylene terephthalate.

In certain embodiments, the soft segment is formed by the aliphaticpolyether, and the aliphatic polyether is selected from the groupconsisting of polytetramethylene ether glycol and polyethylene glycol.

In certain embodiments, the regenerated polyethylene terephthalate hasan intrinsic viscosity from 0.7 to 0.75.

In certain embodiments, the compatibilizer is selected from the groupconsisting of: polycarboxylic acid hydrocarbons, aliphatic anhydrides,polyfunctional epoxides, and combinations thereof.

In certain embodiments, the compatibilizer is selected from the groupconsisting of: 2,2,4,4-diphenyltetracarboxylic acid,3,3,4,4-benzophenone tetracarboxylic acid, pyromellitic aciddianhydride, cyclopentane tetracarboxylic acid, tetrahydrophthalic aciddiglycidyl ester, glycerol diglycidyl ether, and combinations thereof.

In certain embodiments, the modified thermoplastic polyester elastomerfurther comprises an antioxidant, the oxidant being selected from thegroup consisting of: pentaerythritoltetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate),tris(2,4-di-tert-butylphenyl) phosphite, octadecyl3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and combinationsthereof.

In certain embodiments, the modified thermoplastic polyester elastomerhas a Shore hardness from 30D to 60D.

In another aspect, the present disclosure provides a breathable andwaterproof membrane made from a modified thermoplastic polyesterelastomer. The breathable and waterproof membrane has a moisturepermeability of greater than or equal to 25000 g/m²⋅day. The modifiedthermoplastic polyester elastomer is formed from a thermoplasticpolyester elastomer, a regenerated polyethylene terephthalate, and acompatibilizer. Based on a total weight of the modified thermoplasticpolyester elastomer being 100 phr, a content of the regeneratedpolyethylene terephthalate is greater than 0 phr and up to 50 phr. Basedon a total weight of the thermoplastic polyester elastomer being 100 wt%, the thermoplastic polyester elastomer includes 25 wt % to 75 wt % ofhard segments and 25 wt % to 75 wt % of soft segments.

In certain embodiments, the breathable and waterproof membrane has athickness from 10 μm to 50 μm.

In certain embodiments, the breathable and waterproof membrane isnon-microporous.

Therefore, in the modified thermoplastic polyester elastomer and thebreathable and waterproof membrane provided by the present disclosure,by virtue of “the thermoplastic polyester elastomer including 25 wt % to75 wt % of hard segments and 25 wt % to 75 wt % of soft segments” and “acontent of the regenerated polyethylene terephthalate being greater than0 phr and up to 50 phr”, the breathable and waterproof membrane can beproduced to have high moisture permeability.

These and other aspects of the present disclosure will become apparentfrom the following description of the embodiment taken in conjunctionwith the following drawings and their captions, although variations andmodifications therein may be affected without departing from the spiritand scope of the novel concepts of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

There are no drawings.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The present disclosure is more particularly described in the followingexamples that are intended as illustrative only since numerousmodifications and variations therein will be apparent to those skilledin the art. Like numbers in the drawings indicate like componentsthroughout the views. As used in the description herein and throughoutthe claims that follow, unless the context clearly dictates otherwise,the meaning of “a”, “an”, and “the” includes plural reference, and themeaning of “in” includes “in” and “on”. Titles or subtitles can be usedherein for the convenience of a reader, which shall have no influence onthe scope of the present disclosure.

The terms used herein generally have their ordinary meanings in the art.In the case of conflict, the present document, including any definitionsgiven herein, will prevail. The same thing can be expressed in more thanone way. Alternative language and synonyms can be used for any term(s)discussed herein, and no special significance is to be placed uponwhether a term is elaborated or discussed herein. A recital of one ormore synonyms does not exclude the use of other synonyms. The use ofexamples anywhere in this specification including examples of any termsis illustrative only, and in no way limits the scope and meaning of thepresent disclosure or of any exemplified term. Likewise, the presentdisclosure is not limited to various embodiments given herein. Numberingterms such as “first”, “second” or “third” can be used to describevarious components, signals or the like, which are for distinguishingone component/signal from another one only, and are not intended to, norshould be construed to impose any substantive limitations on thecomponents, signals or the like.

The present disclosure provides a modified thermoplastic polyesterelastomer and a breathable and waterproof membrane made therefrom. Themodified thermoplastic polyester elastomer of the present disclosureincludes thermoplastic polyester elastomer (TPEE) and regeneratedpolyethylene terephthalate (PET). Therefore, the modified thermoplasticpolyester elastomer of the present disclosure can include a highpercentage of recycled plastics, so as to achieve recycling.

The thermoplastic polyester elastomer has good processing properties,and is suitable to be applied in manufacturing manners that includeinjection molding, blow molding, or extrusion molding. Furthermore, thethermoplastic polyester elastomer has the softness and elasticity ofrubber and the rigidity and chemical stability of engineering plastics.

In the present disclosure, through choosing specific hard segments andsoft segments, and adjusting and controlling a weight ratio of the hardsegments and the soft segments, a thermoplastic polyester elastomer thathas good moisture permeability and waterproofness can be polymerized.Even when the thermoplastic polyester elastomer of the presentdisclosure is further mixed with the regenerated polyethyleneterephthalate that does not have moisture permeability andwaterproofness, a certain degree of moisture permeability andwaterproofness can still be retained. Therefore, the modifiedthermoplastic polyester elastomer of the present disclosure can be usedto produce a breathable and waterproof membrane, and a content of thebreathable and waterproof membrane includes a high percentage ofrecycled plastics, so as to achieve the effect of reusing recycledplastics. Practical embodiments are described as follows.

[Thermoplastic Polyester Elastomer]

The thermoplastic polyester elastomer of the present disclosure is ablock copolymer including the hard segment and the soft segment in analternating arrangement. Based on a total weight of the thermoplasticpolyester elastomer being 100 wt %, the thermoplastic polyesterelastomer includes 25 wt % to 75 wt % of hard segments and 25 wt % to 75wt % of soft segments. Preferably, the thermoplastic polyester elastomerincludes 30 wt % to 70 wt % of hard segments and 30 wt % to 70 wt % ofsoft segments.

In a preferred embodiment, a content of the soft segment is higher thana content of the hard segment. That is, the thermoplastic polyesterelastomer includes 25 wt % to less than 50 wt % of hard segments and 50wt % to 75 wt % of soft segments. More preferably, the content of thesoft segment is higher than the content of the hard segment, and thethermoplastic polyester elastomer includes 30 wt % to less than 50 wt %of hard segments and 50 wt % to 70 wt % of soft segments. In this way,the thermoplastic polyester elastomer can have better moisturepermeability.

The hard segments of the thermoplastic polyester elastomer are formed byaromatic polyester, and the aromatic polyester is formed from aromaticdicarboxylic acid and aliphatic diol, or from aromatic dicarboxylic acidand alicyclic diol through a copolycondensation reaction. The aromaticdicarboxylic acid may be, but not limited to: benzenedicarboxylic acid,biphenyl dicarboxylic acid, or naphthalene dicarboxylic acid; thealiphatic diol may be, but not limited to: ethanediol, propanediol,butanediol, or hexanediol; and the alicyclic diol may be, but notlimited to: cyclohexanediol. Specifically speaking, the hard segmentshave a number average molecular weight from 30000 to 80000.

In a preferred embodiment, the aromatic polyester that forms the hardsegments is selected from the group consisting of: polyethyleneterephthalate and polybutylene terephthalate (PBT), but is not limitedthereto.

The soft segments of the thermoplastic polyester elastomer are formed byaliphatic polyester or aliphatic polyether, and the aliphatic polyesteris formed from aliphatic dicarboxylic acid and aliphatic diol, or fromaliphatic dicarboxylic acid and alicyclic diol through acopolycondensation reaction. The aliphatic polyether is formed through acopolycondensation reaction of aliphatic diol or through a ring-openingpolymerization of epoxide and aliphatic diol. The aliphatic dicarboxylicacid may be, but not limited to: propionic acid, caproic acid, heptanoicacid, octanoic acid or lauric acid; the aliphatic diol may be, but notlimited to: ethanediol, propanediol, butanediol, or hexanediol; thealicyclic diol may be, but not limited to: cyclohexanediol; and theepoxide may be, but not limited to: ethylene oxide, propylene oxide ortetrahydrofuran. Specifically speaking, the soft segments have a numberaverage molecular weight from 30000 to 80000.

In a preferred embodiment, the soft segments are formed by the aliphaticpolyether, and the aliphatic polyether is selected from the groupconsisting of: polyethylene glycol (PEG) and polytetramethylene etherglycol (PTMEG), but is not limited thereto.

When synthesizing the thermoplastic polyester elastomer, a precursorresin composition including the aforementioned soft segments can bepolymerized first, i.e., first mixing aliphatic dicarboxylic acid andaliphatic diol, or mixing aliphatic dicarboxylic acid and alicyclic diolfor a condensation reaction, or first mixing epoxide and aliphatic diolfor a ring-opening polymerization reaction. Then, monomers (e.g.,aromatic dicarboxylic acid and aliphatic diol or alicyclic diol)required for synthesizing the aforementioned hard segments are put intothe precursor resin composition, and the thermoplastic polyesterelastomer of the present disclosure is completed after thepolymerization reaction. The above steps for manufacturing thethermoplastic polyester elastomer are for illustrative purposes only,and are not intended to limit the scope of the present disclosure.

[Modified Thermoplastic Polyester Elastomer]

The modified thermoplastic polyester elastomer of the present disclosureis formed by mixing the aforementioned thermoplastic polyesterelastomer, the regenerated polyethylene terephthalate, a compatibilizer,and an antioxidant in a melted state. Based on a total weight of themodified thermoplastic polyester elastomer being 100 phr, a content ofthe regenerated polyethylene terephthalate is greater than 0 phr and upto 50 phr, a content of the compatibilizer is 0.1 phr to 3 phr, and acontent of the antioxidant is 0.2 phr to 3 phr.

The source of the regenerated polyethylene terephthalate may beregenerated polyethylene terephthalate bottle chips. After beingrecycled, processed, and regenerated, the regenerated polyethyleneterephthalate bottle chips can be made into the regenerated polyethyleneterephthalate. In this embodiment, the regenerated polyethyleneterephthalate has an intrinsic viscosity from 0.7 to 0.75, and a numberaverage molecular weight from 40000 to 60000.

By adding the compatibilizer, compatibility between the thermoplasticpolyester elastomer and the regenerated polyethylene terephthalate canbe increased, so as to obtain the modified thermoplastic polyesterelastomer that is uniform. In this embodiment, the compatibilizer isselected from the group consisting of: polycarboxylic acid hydrocarbons,aliphatic anhydrides, polyfunctional epoxides, and combinations thereof.For example, the compatibilizer is selected from the group consistingof: 2,2,4,4-diphenyltetracarboxylic acid, 3,3,4,4-benzophenonetetracarboxylic acid, pyromellitic acid dianhydride, cyclopentanetetracarboxylic acid, tetrahydrophthalic acid diglycidyl ester, glyceroldiglycidyl ether, and combinations thereof.

By adding the antioxidant, under conditions where there is water vapor,ozone, or sunlight, the modified thermoplastic polyester elastomer canbe prevented from chain scission and degradation due to reacting withfree radicals. In this embodiment, the antioxidant can be selected fromthe group consisting of: pentaerythritoltetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate),tris(2,4-di-tert-butylphenyl) phosphite, octadecyl3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and combinationsthereof.

Specifically, the modified thermoplastic polyester elastomer has a Shorehardness from 30D to 60D.

[Breathable and Waterproof Membrane]

The breathable and waterproof membrane of the present disclosure can bemade by way of extruding or coating, but is not limited thereto. Thematerial forming the breathable and waterproof membrane includes theaforementioned modified thermoplastic polyester elastomer. That is, thematerial forming the breathable and waterproof membrane includes theaforementioned thermoplastic polyester elastomer, the regeneratedpolyethylene terephthalate, and the compatibilizer, and content ratiosthereof are substantially the same as those described in the previousembodiment and are not reiterated herein.

In this embodiment, the breathable and waterproof membrane is made byway of extrusion. The aforementioned thermoplastic polyester elastomer,the regenerated polyethylene terephthalate, the compatibilizer, and theantioxidant are put into a twin-screw extruder, and after processes ofextruding and stretching, the breathable and waterproof membrane of thepresent disclosure is obtained. In the present disclosure, thebreathable and waterproof membrane has a thickness from 10 μm to 50 μm.

In other embodiments, the breathable and waterproof membrane can be madeby way of coating. The aforementioned thermoplastic polyester elastomer,the regenerated polyethylene terephthalate, the compatibilizer, and theantioxidant are melted into solution by using a solvent, and thesolution is coated on a substrate for baking. After being peeled offfrom the substrate, the breathable and waterproof membrane of thepresent disclosure is obtained.

Furthermore, the breathable and waterproof membrane of the presentdisclosure is a non-porous hydrophilic membrane, that is, the breathableand waterproof membrane is non-microporous. Unlike a breathable andwaterproof membrane that is microporous, a mechanism of thenon-microporous breathable and waterproof membrane to bemoisture-permeable is to utilize hydrophilic chains or hydrophilicgroups in the material to absorb water. Then, the moisture is releasedafter the water spreads to the other side of the breathable andwaterproof membrane, thereby achieving the effect of water vapor (i.e.,moisture) permeability. Since the breathable and waterproof membrane ofthe present disclosure is non-microporous, after a long period of use,there is no decrease in moisture permeability due to micropores beingblocked.

To prove that the modified thermoplastic polyester elastomer of thepresent disclosure can be used to manufacture the breathable andwaterproof membrane, breathable and waterproof membranes of Examples 1to 3 (E1 to E3) and Comparative Example 1 (C1) that have a thickness of15 μm are prepared in the present disclosure. The composition andcontent of the breathable and waterproof membrane are as listed in Table1, and the moisture permeability is tested in compliance with JIS L1099Bl.

TABLE 1 Breathable and Modified thermoplastic polyester elastomer (100phr) waterproof Hard membrane segment:soft Moisture Hard Soft segmentRegenerated permeability segment segment (weight ratio) PET (phr) (g/m²· day) E1 PBT PTMEG, 3:7  1 to 10 85000 to less PEG than 130000 E2 PBTPTMEG, 5:5 11 to 30 50000 to less PEG than 85000 E3 PBT PTMEG, 5:5 31 to50 25000 to less PEG than 50000 C1 PBT PTMEG, 7:3 51 to 70 10000 to lessPEG than 25000

According to the results shown in Table 1, the breathable and waterproofmembrane of the present disclosure has excellent moisture permeability.When a content of the regenerated polyethylene terephthalate in themodified thermoplastic polyester elastomer is not higher than 50 wt %,the moisture permeability of the breathable and waterproof membrane isgreater than or equal to 25000 g/m²⋅day. Preferably, when the content ofthe regenerated polyethylene terephthalate in the modified thermoplasticpolyester elastomer is not higher than 30 wt %, the moisturepermeability of the breathable and waterproof membrane is greater thanor equal to 50000 g/m2 day.

In the modified thermoplastic polyester elastomer, hydrophilicfunctional groups on molecular chains have a certain degree ofhydrophilic ability. Therefore, when one side of the breathable andwaterproof membrane has more moisture, the hydrophilic functional groupscan absorb water vapor. Then, the water vapor can penetrate thebreathable and waterproof membrane and be discharged through anotherside by way of diffusion, so that the breathable and waterproof membraneis moisture permeable.

[Beneficial Effects of the Embodiments]

In conclusion, in the modified thermoplastic polyester elastomer and thebreathable and waterproof membrane provided by the present disclosure,by virtue of “the thermoplastic polyester elastomer including 25 wt % to75 wt % of hard segments and 25 wt % to 75 wt % of soft segments”, thebreathable and waterproof membrane can be produced to have high moisturepermeability.

Moreover, in the modified thermoplastic polyester elastomer and thebreathable and waterproof membrane provided by the present disclosure,by virtue of “a content of the regenerated polyethylene terephthalatebeing greater than 0 phr and up to 50 phr”, the effect of reusingrecycled plastics can be achieved.

Furthermore, in the modified thermoplastic polyester elastomer and thebreathable and waterproof membrane provided by the present disclosure,by virtue of “the compatibilizer being selected from the groupconsisting of: polycarboxylic acid hydrocarbons, aliphatic anhydrides,polyfunctional epoxides, and combinations thereof”, the modifiedthermoplastic polyester elastomer and the regenerated polyethyleneterephthalate can be uniformly mixed.

The foregoing description of the exemplary embodiments of the disclosurehas been presented only for the purposes of illustration and descriptionand is not intended to be exhaustive or to limit the disclosure to theprecise forms disclosed. Many modifications and variations are possiblein light of the above teaching.

The embodiments were chosen and described in order to explain theprinciples of the disclosure and their practical application so as toenable others skilled in the art to utilize the disclosure and variousembodiments and with various modifications as are suited to theparticular use contemplated. Alternative embodiments will becomeapparent to those skilled in the art to which the present disclosurepertains without departing from its spirit and scope.

What is claimed is:
 1. A modified thermoplastic polyester elastomer comprising a thermoplastic polyester elastomer, a regenerated polyethylene terephthalate, and a compatibilizer, wherein, based on a total weight of the modified thermoplastic polyester elastomer being 100 phr, a content of the regenerated polyethylene terephthalate is greater than 0 phr and up to 50 phr; wherein, based on a total weight of the thermoplastic polyester elastomer being 100 wt %, the thermoplastic polyester elastomer includes 25 wt % to 75 wt % of hard segments and 25 wt % to 75 wt % of soft segments, and the hard segments have a number average molecular weight ranging from 30000 to 80000; wherein the compatibilizer is selected from the group consisting of: polycarboxylic acid hydrocarbons, aliphatic anhydrides, and combinations thereof.
 2. The modified thermoplastic polyester elastomer according to claim 1, wherein the hard segment is formed by an aromatic polyester, and the soft segment is formed by an aliphatic polyester or an aliphatic polyether.
 3. The modified thermoplastic polyester elastomer according to claim 2, wherein the aromatic polyester forming the hard segment is selected from the group consisting of polybutylene terephthalate and polyethylene terephthalate.
 4. The modified thermoplastic polyester elastomer according to claim 2, wherein the soft segment is formed by the aliphatic polyether, and the aliphatic polyether is selected from the group consisting of polytetramethylene ether glycol and polyethylene glycol.
 5. The modified thermoplastic polyester elastomer according to claim 1, wherein the regenerated polyethylene terephthalate has an intrinsic viscosity from 0.7 to 0.75.
 6. The modified thermoplastic polyester elastomer according to claim 1, wherein the compatibilizer is selected from the group consisting of: 2,2,4,4-diphenyltetracarboxylic acid, 3,3,4,4-benzophenone tetracarboxylic acid, pyromellitic acid dianhydride, cyclopentane tetracarboxylic acid, and combinations thereof.
 7. The modified thermoplastic polyester elastomer according to claim 1, wherein the modified thermoplastic polyester elastomer further comprises an antioxidant, the antioxidant being selected from the group consisting of: pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), tris(2,4-di-tert-butylphenyl) phosphite, octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and combinations thereof.
 8. The modified thermoplastic polyester elastomer according to claim 1, wherein the modified thermoplastic polyester elastomer has a Shore hardness from 30D to 60D.
 9. A breathable and waterproof membrane made from a modified thermoplastic polyester elastomer, wherein the breathable and waterproof membrane has a moisture permeability of greater than or equal to 25000 g/m²⋅day; wherein the modified thermoplastic polyester elastomer is formed from a thermoplastic polyester elastomer, a regenerated polyethylene terephthalate, and a compatibilizer; wherein, based on a total weight of the modified thermoplastic polyester elastomer being 100 phr, a content of the regenerated polyethylene terephthalate is greater than 0 phr and up to 50 phr; wherein, based on a total weight of the thermoplastic polyester elastomer being 100 wt %, the thermoplastic polyester elastomer includes 25 wt % to 75 wt % of hard segments and 25 wt % to 75 wt % of soft segments, and the hard segments have a number average molecular weight ranging from 30000 to 80000; wherein the compatibilizer is selected from the group consisting of: polycarboxylic acid hydrocarbons, aliphatic anhydrides, and combinations thereof.
 10. The breathable and waterproof membrane according to claim 9, wherein the breathable and waterproof membrane has a thickness from 10 μm to 50 μm.
 11. The breathable and waterproof membrane according to claim 9, wherein the breathable and waterproof membrane is non-microporous. 